Electric-car bunter.



PATENTED JUNE 30, 1903.

J. BRENNAN.

ELECTRIC GAR BUNTER.

Ira e7 (1/02" N0 MOD Patented June 30, 1903.

PATENT OFFICE.

JOHN BRENNAN, OF BROOKLINE, MASSACHUSETTS.

ELECTRIC-CAR BUNTER.

SPECIFICATION forming part of Letters Patent No. 732,041, dated June 30, 1903.

Application filed June 21, 1902.

To (tZZ whom it may concern:

Be it known that I, JOHN BRENNAN, a subject of the King of Great Britain, residing at Brookline, in the county of Norfolk and State of. Massachusetts, have invented an Improvement in Gar-Buifers, of which the following is a specification.

My invention relates to an improvement in spring car bumpers or buffers, and particularly to those used for street-cars; and my invention consists in certain novel features of construction and combinations of parts, as hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional plan of my improved car-bufier. Fig. 2 is a vertical section of the same on the line 2 2 of Fig. 1. Fig. 3 is a detail to be referred to.

In the said drawings, A represents the stationary section of the buffer, which is adapted to be secured by suitable bolts to the end sill of the car and comprises a curved base-plate 10. and a hollow portion or casing 2, preferably of oblong or oval shape and open at its front end for the reception of the movable head or outer portion B of the buffer, which is adapted to slide telescopically within the casing 12. At the inner end of the casing or chamber 12 and located on each side of the center thereof are two outwardly-extending cylindrical studs or projections 14 14, cast integral with the plate 10, and over these projections are fitted the inner ends of two strong spiral springs 15 15, which are thus supported and held in place by said project-ions, the opposite ends of the springs fitting within circular openings or recesses 16, formed in the head B for their reception. When the buffer is compressed by force applied to the head 13, the springs are caused to pass farther onto the projections 14, which in connection with the walls of the recesses 16 form guides which prevent the springs from buckling or being displaced laterally when compressed.

The two sections A B of the buffer are held together and kept in alinement by means of a central connecting piece or bar 0, Figs. 2 and 3, which is removably secured to the head portion 13 by screws 18 and is adapted to slide in a horizontal dovetail groove or guideway 19, said bar being provided at its inner end with a head 20, normally bearing against Serial No. 112,699. (No model.)

the inner concave wall or face of the section A and forming a stop for limiting the outward movement of the movable section B under the influence of the springs 15. The outer face of the movable piece 13 is preferably covered with a thick plate D, of rubber, secured thereto by countersunk bolts or in any other suitable manner and affording additional means of relieving the shock or concussion produced by a collision.

What I'claim as my invention, and desire to secure by Letters Patent, is-

1. A car-bufier comprising a stationary section having a hollow chamber or casing provided at its inner end with studs or projections located on each side of the center, a movable portion or section adapted to slide within said chamber and provided with circular recesses arranged opposite to said studs or projections, spiral springs supported at their inner ends upon said studs and having their front portions within the said circular recesses of the movable section, and a contrally-located connecting-piece secured to the outer movable section and sliding in a guideway in the stationary section and provided with a head forming a stop for limiting the outward movement of the movable section.

2. In a car-bufier, the combination of the stationary section with its hollow casingor chamber provided with studs or projections located on each side of the center, the movable portion or head having its outer face covered with rubber and provided with circular recesses opposite to said studs or projections, spiral springs interposed between the two sections and having their outer ends within said recesses and their inner ends encircling and supported upon said studs, and a central guide-bar secured at one end to the movable section and sliding in a guideway in the stationary section and provided with a head forming a stop for limitingthe outward movement of, the movable section.

In testimony whereof I havesign'edmy name to this specification, in the presence of two subscribing witnesses, this 18th day of June, A. D. 1902.

JOHN BRENNAN.

Witnesses:

WALTER T. HANNIGAN SARAH S. BRENNAN. 

